I want change my password for my administrator account but I forgit the password I remember just password for my limited account ? Can any one help me I NEED THAT HELP SO MUCH I don't want to format my PC again? I need know how I can do that

First, you have to define what password you refer to. Power on password, Windows password (which version) etc.

By the way why did you post this in the Heating and Air Conditioning forum? I moved it to the correct forum for you.